Charge transport in nanostructured materials for solar energy conversion studied by time-resolved terahertz spectroscopy

0350339 - FZÚ 2011 RIV CH eng J - Journal Article
Němec, Hynek - Kužel, Petr - Sundström, V.
Charge transport in nanostructured materials for solar energy conversion studied by time-resolved terahertz spectroscopy.
Journal of Photochemistry and Photobiology A-Chemistry. Roč. 215, 2-3 (2010), s. 123-139. ISSN 1010-6030. E-ISSN 1873-2666
R&D Projects: GA ČR(CZ) GP202/09/P099; GA AV ČR(CZ) IAA100100902; GA MŠMT LC512
Institutional research plan: CEZ:AV0Z10100520
Keywords : time-resolved terahertz spectroscopy * ultrafast dynamics * bulk heterojunction * semiconductor nanostructures * transport * mobility
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 2.243, year: 2010

Spectra of far-infrared conductivity contain useful information on charge transport at nanoscopic length scales. However, decrypting the mechanisms and parameters of charge transport from the measured spectra is a complex task in nanostructured systems: in particular, the conductivity is strongly influenced by charge carrier interaction with surfaces or interfaces between constituents of the composite material as well as by local field effects. Here we review our work on transient far-infrared conductivity in polymer:fullerene bulk heterojunctions and in bare and dye-sensitized semiconductor nanoparticles. Measurements performed by time-resolved terahertz spectroscopy are complemented by Monte-Carlo calculations which clearly link the charge transport properties and the terahertz conductivity spectra.
Permanent Link: http://hdl.handle.net/11104/0006131